I HAVE AN IMPORTANT QUESTION?

I AM AN AMATURE BODYBUILDER AND I INJECTED MYSELF WITH 250CC OF DECA-DURABOLIN ON THURSDAY 6/1. THE NEXT DAY MY ARM WAS ALL RED AND IT FEELS LIKE IT IS ON FIRE. THERE IS SWELLING AROUND THE AREA AND HEAT RADIATING FROM IT. TODAY IS TUESDAY 6/6 AND I AM STILL IN PAIN, WHAT SHOULD I DO?

Optional Information:
Male , Age: 26

Already Tried:
an antiboitic